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Technical Specifications
Last Updated: 2026-10-22| Identity | |
| Brand |  |
| Product Number | SPMDSP75 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V19.00 oz-in1.37 kg-cm0.1 N-mBelow Average |
| Speed |
4.8V0.11 sec/60°545.5 deg/s90.9 RPMAverage |
| Physical | |
| Weight | 0.26 oz7.5 gAbove Average |
| Dimensions |
L 0.90 in W 0.45 in H 0.94 in L 22.9 mm W 11.4 mm H 23.9 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Nylon |
| Rotation/Support | Bushing |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 110° |
| Pulse Cycle | 10 ms |
| Pulse Width | 650-2400 µs |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Idle Current | 0.004 A4 mA |
| Connectivity | |
| Connector | JR (Universal) |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Below Average Stronger than 21% of 349 Digital Micro servos at 4.8V |
| Speed | Average Faster than 55% of 347 Digital Micro servos at 4.8V |
| Weight | Above Average Lighter than 80% of 597 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.32 W |
| Power Density | 0.839 W/in³ More power-dense than 10% of 563 Digital Micro servos |
| Torque Density | 2.5333 oz-in/g Stronger than 55% of 349 Digital Micro servos |
| Torque-to-Volume Ratio | 49.91 oz-in/in³ Denser torque than 17% of 345 Digital Micro servos |
| Speed-to-Weight | 1.21212 (1/sec·g) Faster than 82% of 347 Digital Micro servos |
| Speed-Torque Trade-off | 2.09 Better balanced than 26% of 345 Digital Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 38% of 496 Digital Micro servos |
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Reviews (3)
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loohooloo
February 1, 2013Application(s): E-flite Ultimate 3D
Comments: I bought 4 of DSP75. All of them have centering issues; they are constantly searching for centers and causing control surfaces to vibrate like crazy. You have to decrease the loads for the servos or dampen the servo motions by using light rubber bands around the servo. Seriously, specktrum knows this issues. Just google Spektrum SPMDSP75 oscillation problem. I hope they still have the page online.
I don't know if i should risk my Ultimate 3D for a test flight.
Spad475
November 13, 2011Application(s): 20 ounce balsa model, electric motor
Comments: Spectrum gave these away with their i6 Radio. They don't work. Have four of them. None work.
Rosiesdad
July 21, 2011Application(s): throttle on a 60 size airplane
Comments: installed for a max of 4 hours. no flying thank goodness
just setting up and testing the engine. It froze up solid.
It always made noises like it wouldn't stop seeking. Had another new one. Just plugged it in the receiver to test and same noises and seeking. Didn't install the second one for fear it would freeze up too. They are going back. I consider them JUNK !